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WO2008115329A1 - Articles revêtus à faible émissivité et leurs procédés de fabrication - Google Patents

Articles revêtus à faible émissivité et leurs procédés de fabrication Download PDF

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Publication number
WO2008115329A1
WO2008115329A1 PCT/US2008/001997 US2008001997W WO2008115329A1 WO 2008115329 A1 WO2008115329 A1 WO 2008115329A1 US 2008001997 W US2008001997 W US 2008001997W WO 2008115329 A1 WO2008115329 A1 WO 2008115329A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
window unit
coated article
shgc
glass
Prior art date
Application number
PCT/US2008/001997
Other languages
English (en)
Inventor
Richard Blacker
Brent Boyce
Original Assignee
Guardian Industries Corp.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=39496134&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2008115329(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Guardian Industries Corp. filed Critical Guardian Industries Corp.
Priority to PL08725609T priority Critical patent/PL2118032T3/pl
Priority to CA2676780A priority patent/CA2676780C/fr
Priority to EP08725609.5A priority patent/EP2118032B1/fr
Priority to BRPI0808928A priority patent/BRPI0808928B1/pt
Priority to RU2009138030/03A priority patent/RU2469003C2/ru
Priority to MX2009009617A priority patent/MX2009009617A/es
Priority to ES08725609.5T priority patent/ES2673901T3/es
Publication of WO2008115329A1 publication Critical patent/WO2008115329A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • C03C17/3602—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer
    • C03C17/3607—Coatings of the type glass/inorganic compound/metal
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • C03C17/3602—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer
    • C03C17/3618—Coatings of type glass/inorganic compound/other inorganic layers, at least one layer being metallic
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • C03C17/3602—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer
    • C03C17/3626—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer one layer at least containing a nitride, oxynitride, boronitride or carbonitride
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • C03C17/3602—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer
    • C03C17/3644—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer the metal being silver
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • C03C17/3602—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer
    • C03C17/3655—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer the multilayer coating containing at least one conducting layer
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • C03C17/3602—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer
    • C03C17/3657—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer the multilayer coating having optical properties
    • C03C17/366—Low-emissivity or solar control coatings
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • C03C17/3602—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer
    • C03C17/3681—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer the multilayer coating being used in glazing, e.g. windows or windscreens
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/2495—Thickness [relative or absolute]
    • Y10T428/24967—Absolute thicknesses specified
    • Y10T428/24975—No layer or component greater than 5 mils thick
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
    • Y10T428/264—Up to 3 mils
    • Y10T428/265—1 mil or less

Definitions

  • the low- E coated articles may or may not be heat treated (e.g., thermally tempered, heat bent, or heat strengthened).
  • the low-E coated articles may be designed so as to realize a combination of good visible transmission (T V j S ) and an excellent solar heat gain coefficient (SHGC) so has to have an improved (i.e., higher) T vis /SHGC ratio.
  • the low-E coated articles may have approximately the same color characteristics as viewed by the naked eye both before and after heat treatment (i.e., a low ⁇ E* value) in certain example instances.
  • Such coated articles may be used in insulating glass (IG) units, windows, and/or other suitable applications.
  • Coated articles are known in the art for use in window applications such as insulating glass (IG) window units, vehicle windows, and/or the like.
  • designers of coated articles may strive for a combination of good visible transmission, low emissivity (or emittance), and blockage of undesirable radiation such as infrared (IR) radiation to prevent or reduce undesirable heating of building or vehicle interiors.
  • High visible transmission for example may permit coated articles to be more desirable in certain window applications, whereas low emissivity (low-E), low SHGC (solar heat gain coefficient), and low SF (solar factor, or g-value) characteristics permit coated articles to block significant amounts of undesirable radiation so as to reduce, for example, undesirable heating of building or vehicle interiors.
  • SF calculated in accordance with DIN standard 67507 or EN410: 1998, relates to a ratio between the total energy entering a room or the like through a glazing and the incident solar energy.
  • low SF values are indicative of good solar protection against undesirable heating of rooms or the like protected by windows/glazings.
  • a low SF value is indicative of a coated article that is capable of keeping a room fairly cool in summertime months during hot ambient conditions.
  • the SHGC of an article/window is the fraction of incident solar radiation that is admitted through the article/window (e.g., see NFRC 100-2001 hereby incorporated herein by reference).
  • U.S. Patent No. 5,688,585 discloses a solar control coated article including: glass/Si 3 N 4 /NiCr/Si 3 N 4 .
  • One object of the '585 patent is to provide a sputter coated layer system that after heat treatment is matchable colorwise with its non-heat treated counterpart. While the coating systems of the '585 patent are excellent for their intended purposes, they suffer from certain disadvantages. In particular, they tend to have rather high emissivity values (e.g., because no silver (Ag) layer is disclosed in the '585 patent).
  • Low-emissivity (low-E) coating systems are also known in the art.
  • U.S. Patent No. 6,475,626 discloses: glass/Si 3 N 4 /NiCr/Ag/NiCr/Si 3 N 4 .
  • Low-E coating systems of the '626 Patent provide good visible transmission and low-E characteristics.
  • coating systems of the '626 Patent cannot achieve a combination of good visible transmission (Ty 15 ) and good solar heat gain coefficient (SHGC).
  • the coating systems of the '626 Patent have undesirably low T v , s /SHGC ratios.
  • Example 1 of the '626 Patent in the context of an insulating glass (IG) unit was only able to realize a T V1S /SHGC ratio of about 128.
  • Example 2 of the '626 Patent in the context of an insulating glass (IG) unit was only able to realize a T v , s /SHGC ratio of about 127, and Example 2 of the '626 Patent monolithically was only able to realize a T VIS /SHGC ratio of about 1 14.
  • U.S. Patent No. 6,782,718 also discloses glass/Si 3 N 4 /NiCr/Ag/NiCr/Si 3 N 4 .
  • the coating systems of the '718 Patent have undesirably low T VIS /SHGC ratios.
  • the Example in column seventeen of the '718 Patent in the context of an insulating glass (IG) unit was only able to realize a T v i s /SHGC ratio of about 127 (heat treated or HT) or 123 (not HT).
  • U.S. Patent No. 5,800,933 discloses another example coated article.
  • coated articles of the '933 Patent have undesirably high SHGC values thereby indicating inefficient solar protection against undesirable heating of rooms or the like.
  • U.S. Patent Nos. 6,014,872 and 5,800,933 disclose a heat treatable low-E layer system including: glassTiO 2 /Si 3 N 4 /NiCr/Ag/NiCr/Si 3 N 4 . Unfortunately, when heat treated this low-E layer system is not approximately matchable colorwise with its non-heat treated counterpart (as viewed from the glass side).
  • this low-E layer system has a ⁇ E* (glass side) value of greater than 4.1 (i.e., for Example B, ⁇ a* G is 1.49, ⁇ b* G is 3.81 , and ⁇ L* (glass side) is not measured; using Equation (1) below then ⁇ E* on the glass side must necessarily be greater than 4.1 and is probably much higher than that).
  • a currently coating has a stack of: glass/Si 3 N 4 (14.3 nm)/NiCr(3.8 nm)/Ag(10.6 nm)/NiCr(2.4 nm)/Si 3 N 4 (48.4 nm). While this coated article has a glass side ⁇ E* value of less than 2 (monolithic) and a SHGC value of 0.35 (monolithic) or 0.30 (IG unit), it can only achieve a visible transmission of 48.4% (monolithic) or 43.4% (IG unit).
  • T vis /SHGC ratio is only 138 (monolithic), or 144 (IG, with a low visible transmission of 43.4%).
  • the double-silver coatings of U.S. Patent No. 7, 138,182 realize a low SHGC, but at the expense of low visible transmission.
  • the ' 182 coatings are undesirable in that they both: require two silver layers, and sacrifice visible transmission in order to realize a low SHGC.
  • the coated article if heat treated may also have a low ⁇ E* value indicating thermal stability upon heat treatment (HT).
  • HT thermal stability upon heat treatment
  • low-E coated articles relate to low-E (low emissivity) coated articles.
  • the low- E coated articles may or may not be heat treated (e.g., thermally tempered, heat bent, or heat strengthened).
  • the low-E coated articles may be designed so as to realize a combination of good visible transmission (T v j S ) and an excellent solar heat gain coefficient (SHGC) so has to have an improved (i.e., higher) T V j S /SHGC ratio.
  • a low-E coated article may have a T vis /SHGC ratio of at least 140, more preferably of at least 145, even more preferably of at least 150 or 153.
  • the coated article may have an SHGC value of no greater than 0.36, more preferably no greater than 0.35, even more preferably no greater than 0.34 or 0.33.
  • the coated article may have a visible transmission (T V j S ) of from about 40-65%, more preferably from about 45-60%, and most preferably from about 48-57% or from about 49-56%.
  • the low-E coated articles may have approximately the same color characteristics as viewed by the naked eye both before and after heat treatment (i.e., a low ⁇ E* value) in certain example instances.
  • Such coated articles may be used in insulating glass (IG) units, windows, and/or other suitable applications.
  • the coated article may have a glass side reflective ⁇ E* value of no greater than about 3.0, more preferably no greater than about 2.75, even more preferably no greater than about 2.5, and possibly no greater than about 2.25 or 2.0.
  • an insulating glass (IG) window unit comprising: first and second glass substrates coupled to each other proximate their respective edges so as to form an insulating space therebetween; a layer system supported by one of the glass substrates proximate the insulating space, said layer system comprising an infrared (IR) reflecting layer comprising silver located between at least first and second dielectric layers, wherein said layer system includes only one IR reflecting layer comprising silver (or gold, or platinum); and wherein the IG window unit has a visible transmission (Ty 15 ) of 47-60%, a SHGC Of no greater than 0.36, and a T V1S /SHGC ratio of at least 140.
  • IR infrared
  • a coated article comprising: a coating supported by a glass substrate, said coating comprising an infrared (IR) reflecting layer comprising silver located between at least first and second dielectric layers, wherein said coating includes only one IR reflecting layer comprising silver; and wherein the coated article measured monolithically has a visible transmission (T V1S ) of 50-65%, a SHGC Of no greater than 0.41, and a T v15 ZSHGC ratio of at least 140.
  • IR infrared
  • a method of making such a coated article may also be provided, where each of the layers may be sputter-deposited or otherwise deposited on the glass substrate, and optionally thereafter the glass substrate with the coating thereon may be heat treated (e.g., thermally tempered).
  • Fig. 1 is a partial side cross sectional view of an embodiment of a layer system according to this invention.
  • FIG. 2 is a partial cross-sectional view of an IG unit as contemplated by an example embodiment of this invention, in which the layer system of Fig. 1 may be used.
  • Fig. 3 is a chart setting forth data of Examples 1 -4 according to example embodiments of this invention, based on modeling.
  • Certain embodiments of this invention provide a coating or layer system that may be used in applications such as IG units, vehicle windows, vehicle windshields, and other suitable applications.
  • Certain example embodiments of this invention relate to low-E (low emissivity) coated articles.
  • the low-E coated articles may or may not be heat treated (e.g., thermally tempered, heat bent, or heat strengthened).
  • the low-E coated articles may be designed so as to realize a combination of good visible transmission (T v ⁇ s ) and an excellent solar heat gain coefficient (SHGC) so has to have an improved (i.e., higher) T V1S /SHGC ratio. This ratio may be called a light to solar gain ratio in certain instances.
  • a low-E coated article may have a T V1S /SHGC ratio of at least 140, more preferably of at least 145, even more preferably of at least 150 or 153.
  • T v , s visible transmission
  • these T V1S /SHGC ratios would be considered at least 1.40, more preferably of at least 1.45, even more preferably of at least 1.50 or 1.53.
  • the coated article may have an SHGC value of no greater than 0.36, more preferably no greater than 0.35, even more preferably no greater than 0.34 or 0.33.
  • the coated article may have a visible transmission (Ty 15 ) of from about 40-65%, more preferably from about 45-60%, and most preferably from about 48-57% or from about 49-56%.
  • Ty 15 visible transmission
  • the above data may be in the context of an IG unit and/or monolithic in different example embodiments of this invention.
  • the low-E coated articles may have approximately the same color characteristics as viewed by the naked eye both before and after heat treatment (i.e., a low ⁇ E* value) in certain example instances.
  • Certain embodiments of this invention provide a layer system that has excellent color stability (i.e., a low value of ⁇ E* and/or a low value of ⁇ a*; where ⁇ is indicative of change in view of heat treatment) with heat treatment (e.g., thermal tempering, bending, or thermal heat strengthening) monolithically and/or in the context of dual pane environments such as IG units or windshields.
  • the coated substrate may have a glass side reflective ⁇ E* value of no greater than about 3.0, more preferably no greater than about 2.75. even more preferably no greater than about 2.5, and possibly no greater than about 2.25 or 2.0.
  • Figure 1 is a side cross sectional view of a coated article according to an example embodiment of this invention.
  • the coated article includes substrate 1 (e.g., clear, green, bronze, grey, blue, or blue-green glass substrate from about 1.0 to 12.0 mm thick, e.g., about 6 mm thick), first dielectric layer 3 (e.g., of or including silicon nitride (e.g., Si 3 N 4 ), titanium dioxide, titanium nitride, zirconium oxide, zirconium nitride, tin oxide, silicon oxide, silicon dioxide, silicon oxynitride, or zinc oxide), metallic or substantially metallic nickel (Ni) or nickel-chrome (NiCr) inclusive layer 5 (other oxidation resistant materials may be used instead of Ni or NiCr in alternative embodiments of this invention), metallic or substantially metallic IR reflecting silver (Ag) based layer 7, metallic or substantially metallic nickel (Ni) or nickel-chrome (NiCr) inclusive layer 9 (other oxidation resistant materials may be
  • layer(s) below or above the illustrated coating system may also be provided.
  • the layer system is “on” or “supported by” substrate 1 (directly or indirectly), other layer(s) may be provided therebetween.
  • the layer system of Fig. 1 may be considered “on” the substrate 1 even though other layer(s) may be provided therebetween.
  • IR reflecting Ag layer 7 is preferably Ag metal, although it is possible that some small amount of oxidation could occur with respect thereto.
  • layers 5, 7 and 9 are no more than about 25% oxidized, more preferably no more than about 10% oxidized, and most preferably no more than about 1 , 2 or 4, or even up to 7- 8% oxidized and/or nitrided.
  • layers 5 and/or 9 are of non-nitrided and nonoxidized nickel or nickel alloy (e.g., nichrome of, by weight percent, 80/20 nickel/chrome).
  • Layers 3, 5, 7, 9 and 1 1 may be deposited on the glass substrate via sputtering, or via any other suitable technique.
  • layers 3 and 1 1 comprise silicon nitride (e.g., Si 3 N 4 or any other suitable stoichiometry)
  • a target including Si employed to form these layers may be admixed with up to 6-20% by weight aluminum or stainless steel (e.g. SS#316), with about this amount then appearing in the layers so formed.
  • layers 5 and 9 may be metallic nickel, a nichrome preferably consisting essentially of, by weight about 80-90% Ni and 10-20% Cr (or 50/50 Ni/Cr), may be employed in certain example embodiments.
  • Other metals or alloys may also be used in alternative embodiments, e.g., alloy(s) include 10% or more Ni.
  • layer 7 herein consists essentially of metallic silver in certain embodiments of this invention.
  • An example of layers 5 and 9 includes not only SS-316 which consists essentially of 10% Ni and 90% other ingredients, mainly Fe and Cr, but Haynes 214 alloy as well, which by weight consists essentially of (as a nominal composition):
  • Fig. 2 illustrates the coating or layer system 22 of Fig. 1 being utilized on surface #2 of an IG window unit.
  • the IG unit includes outside glass pane or sheet 21 (or 1) and inside glass pane or sheet 23. These two glass substrates (e.g. float glass 2 mm to 12 mm thick) are sealed at their peripheral edges by a sealant 25 or the like, and may be provided with a conventional desiccant strip 27. The panes are then retained in a conventional window or door retaining frame (shown in partial schematic form).
  • insulating space 30 may be at a pressure less than atmospheric pressure in certain alternative embodiments, although this of course is not necessary in all embodiments.
  • Either inner wall 24 or 26 (or both) may be provided with a coating 22 (see Fig. 1) of this invention.
  • inner wall 24 (i.e., surface #2) of outside glass sheet 21 has been provided with a sputter-coated layer system of Fig. 1 thereon.
  • the preferred thicknesses and materials for the respective layers on the glass substrate 1 are as follows (note that stoichiometrics such as Si 3 N 4 are used for purposes of example only and without limitation):
  • Si 3 N 4 (layer 3) 150-900 A 200-350 A 230-320 A
  • NiCr layer 5-1080 (or 10-40) A 15-40 A 17-30 A
  • NiCr layer 9) 10-80 (or 10-40) A 15-40 A 17-30 A
  • Si 3 N 4 (layer 1 1) 400-600 A 450-560 A 465-540 A
  • the Ag layer 7 has been thickened, the top silicon nitride layer 1 1 has been thickened, and the bottom silicon nitride layer 3 may be thinned.
  • the NiCr layers have also been thinned.
  • An example excellent thickness range for layer 5 and/or 9 is from about 18-23 angstroms. Surprisingly, it is believed that one or more of these changes results an improved (higher) T V , S /SHGC ratio without significantly sacrificing visible transmission or ⁇ E* values in optional heat treated embodiments. Note that the thicknesses are physical thicknesses.
  • HT thermal tempering, heat bending, or the like.
  • ⁇ E* values are calculated is set forth in U.S. Patent No. 6,475.626, which is incorporated herein by reference.
  • low glass side reflective ⁇ E* values indicate that two glass substrates having the same coating system thereon (one heat treated after deposition and the other not heat treated) appear to the naked human eye to look substantially the same when viewed from the glass side of the product (i.e. looking through at least one substrate of glass before viewing the coating).
  • values ⁇ E* and ⁇ a* are important in determining whether or not there is matchability, or substantial matchability, between a HT and non-HT product having the same coating (or between a given product before compared to after it has been HT).
  • color herein is described by reference to the conventional a*, b* values, and the term ⁇ a* is simply indicative of how much color value a* changes due to heat treatment (HT).
  • ⁇ E* is calculated in a known manner using the CIE LAB Scale L*, a*, b* values which are known.
  • coated articles herein provided on clear monolithic glass substrates have color as follows before heat treatment, as viewed from the glass side of the coated article (R 0 %):
  • layer systems provided on clear monolithic glass substrates have color characteristics ⁇ E* and ⁇ a* as follows, when viewed from the glass (G) side (as opposed to the layer side) of the coated article:
  • monolithic coated articles according to certain embodiments of this invention have a ⁇ E* value (glass side) of no greater than 3.0, more preferably no greater than 2.5, and even more preferably no greater than 2.0; and have a ⁇ a* value (glass side) of no greater than about 2.0, more preferably no greater than 1.5.
  • ⁇ E* value glass side
  • ⁇ a* value glass side
  • b* values are not deemed as important as a* values, because a* changes are believed to be more noticeable to the naked human eye than are b* changes in certain instances.
  • Table 4 sets forth example characteristics of monolithic coated articles according to example embodiments of this invention. The values in Table 4 apply to non-HT and/or HT products, except that ⁇ E* is applicable only to HT products, and assume a clear substrate for purposes of example only.
  • EXAMPLES 1-4 [0035] Four example coated articles are set forth in Fig. 3. Each of these examples had a layer stack of: glass/Si 3 N 4 /NiCr/Ag/NiCr/Si 3 N 4 , and the thicknesses of the layers are set forth in Fig. 3 in units of run. Note that no titanium oxide (TiO2) layer was present in any of these example as the bottom-most layer, although this is possible in certain instances.
  • the data relating to Examples 1-4 is also set forth in Fig. 3, both with respect to monolithic (mono) and IG unit (IGU). The glass substrates in these examples were about 6 mm thick and were clear. The data in Fig. 3 was taken prior to optional HT.
  • the T V j S /SHGC ratio is a function of the number of Ag or Au based IR reflecting layers. For instances, if there were two IR reflecting layers, the ratio would be significantly higher (e.g., 190 (or 195) or above for two silver IR reflecting layers).
  • Intensity of reflected visible wavelength light i.e. "reflectance” is defined by its percentage and is reported as R x Y or R x (i.e. the Y value cited below in ASTM E-308- 85), wherein "X” is either “G” for glass side or “F” for film side.
  • Glass side e.g. “G”
  • film side i.e. “F”
  • heat treatment and "heat treating” as used herein mean heating the article to a temperature sufficient to enabling thermal tempering, bending, or heat strengthening of the glass inclusive article.
  • This definition includes, for example, heating a coated article using temperature(s) of at least about 550 degrees C, more preferably at least about 580 or 600 degrees C, for a sufficient period to enable tempering or heat bending.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Surface Treatment Of Glass (AREA)
  • Glass Compositions (AREA)

Abstract

Dans certains modes de réalisation, des articles revêtus à faible émissivité peuvent être conçus pour obtenir une combinaison de bonne transmission visible (TvjS) et d'excellent coefficient d'amplification thermique solaire (SHGC), ce qui permet d'augmenter le rapport Tvis/SHGC. Dans certains modes de réalisation, s'ils sont soumis à un traitement thermique (HT), ces articles revêtus à faible émissivité peuvent présenter des caractéristiques colorées sensiblement les mêmes que celles qui sont visualisées à l'oeil nu avant et après traitement thermique (notamment, une valeur ΔE* basse), selon certains exemples. Ces articles revêtus peuvent être utilisés dans des ensembles en verre isolant (IG), des fenêtres et/ou d'autres domaines appropriés.
PCT/US2008/001997 2007-03-15 2008-02-15 Articles revêtus à faible émissivité et leurs procédés de fabrication WO2008115329A1 (fr)

Priority Applications (7)

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PL08725609T PL2118032T3 (pl) 2007-03-15 2008-02-15 Niskoemisyjne artykuły powleczone i sposoby ich wytwarzania
CA2676780A CA2676780C (fr) 2007-03-15 2008-02-15 Articles revetus a faible emissivite et leurs procedes de fabrication
EP08725609.5A EP2118032B1 (fr) 2007-03-15 2008-02-15 Articles revêtus à faible émissivité et leurs procédés de fabrication
BRPI0808928A BRPI0808928B1 (pt) 2007-03-15 2008-02-15 unidade de janela de vidro isolante
RU2009138030/03A RU2469003C2 (ru) 2007-03-15 2008-02-15 Низкоэмиссионные покрытые изделия
MX2009009617A MX2009009617A (es) 2007-03-15 2008-02-15 Articulos con recubrimiento de low-e y metodos para hacer los mismos.
ES08725609.5T ES2673901T3 (es) 2007-03-15 2008-02-15 Artículos revestidos con baja emisividad y métodos para su fabricación

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US11/724,327 US7655313B2 (en) 2007-03-15 2007-03-15 Low-E coated articles and methods of making same
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BRPI0808928A2 (pt) 2014-10-14
PL2118032T3 (pl) 2018-07-31
RU2009138030A (ru) 2011-04-20
US20100104840A1 (en) 2010-04-29
MX2009009617A (es) 2009-09-21
US20080226925A1 (en) 2008-09-18
CA2676780C (fr) 2012-06-05
US7655313B2 (en) 2010-02-02
RU2469003C2 (ru) 2012-12-10
CA2676780A1 (fr) 2008-09-25
BRPI0808928B1 (pt) 2018-10-16
ES2673901T3 (es) 2018-06-26

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